Weather forecast for today, the 15th (Thursday): Fair autumn weather across much of western and eastern Japan; strong winds and localized rain or thunderstorms in northern Japan.

2026/10/15 07:00

On Thursday, the 15th, Sunny Spot released its first forecast for the 2026 autumn foliage season across the country. Please use this information to help plan your autumn leaf-viewing trips.



The timing of peak autumn foliage is linked to temperatures during the autumn months (September through November). Generally, cooler temperatures cause the colors to peak earlier, while warmer temperatures delay the process.

This September, limited sunshine?caused by the autumn rain front stalling near Honshu?resulted in average temperatures nationwide that were close to normal levels. However, due to cool air, some areas in Eastern Japan experienced temperatures below the seasonal average. In early October, high-pressure systems became more dominant, leading to a trend of temperatures near or above average across Honshu.

Looking ahead, temperatures are expected to remain above average from mid-October through November. Consequently, the peak foliage season is predicted to arrive later than usual. This delay is expected to be particularly noticeable in the lowland areas of Eastern and Western Japan.



#Northern Japan
Northern Japan experienced a period of cool air and lower temperatures, particularly during the first half of September; this allowed the foliage to change color steadily in the high-altitude mountainous regions of Hokkaido. Many areas in northern Hokkaido are already expected to be at their peak.
As temperatures are forecast to remain above average through November, the peak foliage season at many locations will likely occur either around the usual time or later than normal. We forecast the peak viewing period for autumn foliage to be around November 4 in Sapporo, November 14 in Akita, and November 21 in Sendai.

#Eastern Japan
In Eastern Japan, average temperatures fell below seasonal norms at times during September, which likely spurred the onset of autumn coloration in some high-altitude mountainous areas. However, as temperatures are expected to remain above average through November, the peak viewing period in many regions will likely be delayed. In lowland areas, the peak is expected to arrive either around the usual time or later than average.
We forecast the peak viewing period for Tokyo to be around November 27.

#Western Japan
In Western Japan, average temperatures from September through early October were near or above seasonal norms, and this trend of warmer-than-average temperatures is expected to continue through November. Nevertheless, due to nighttime radiative cooling?which lowers temperatures by the following morning?many high-altitude mountainous areas are likely to reach their peak between mid- and late November.
In lowland areas, however, the peak is expected to arrive around the usual time or later, with many locations likely reaching their peak in December. We forecast the peak viewing period to be around December 2 for Osaka, December 9 for Kochi, and December 3 for Fukuoka.

Weather forecast for today, the 15th (Thursday): Fair autumn weather across much of western and eastern Japan; strong winds and localized rain or thunderstorms in northern Japan.

2026/10/15 06:41

Today, Thursday the 15th, a high-pressure system extending from the west will cover a wide area of ??Honshu, primarily across Western and Eastern Japan.

Many areas in Western and Eastern Japan will enjoy clear autumn weather. Daytime temperatures will hover around 25 C in Western Japan, creating conditions where you might even break a slight sweat in sunny spots. Eastern Japan is expected to see highs around 23 C, making for a pleasant day.



In the Tohoku region, a localized front?not depicted on standard weather charts?is likely to pass through during the afternoon. Consequently, the weather will deteriorate, bringing rain and thunderstorms to some areas. Parts of Niigata Prefecture may also experience brief rain or thunderstorms around evening. Even if it isn't raining when you head out, it would be wise to carry a folding umbrella.

Hokkaido will see rain?accompanied by localized thunderstorms?primarily during the morning hours. Due to cold air aloft, snow may fall in high-altitude mountainous areas. Additionally, the pressure gradient remains tight, meaning strong winds will persist from the previous day, Wednesday the 14th.
Gale warnings have been issued for parts of Hokkaido facing the Sea of ??Japan; please exercise caution regarding violent winds. Coastal areas should also be extremely vigilant against high waves.

Weather for tomorrow, the 15th (Thursday): Sunny, mainly in western Japan; caution advised regarding strong winds in parts of Hokkaido.

2026/10/14 18:59

As of 3:00 PM today, Wednesday the 14th, a developing low-pressure system is located near Sakhalin and moving northward. Although a cold front has already passed over Honshu, the influence of cold air aloft is causing scattered rain along the Sea of ??Japan coast from western to northern Japan. Strong winds are blowing near Hokkaido due to a steep pressure gradient, and gale warnings have been issued for some areas along the Sea of ??Japan coast.





The low-pressure system is expected to intensify further and move into the Sea of ??Okhotsk by tomorrow, Thursday the 15th. Consequently, caution regarding gale-force winds and high waves is advised for Hokkaido through tomorrow. Strong winds are also expected along the Sea of ??Japan coast in the Tohoku region. Due to cold air aloft, Hokkaido and northern Tohoku will see cloudy skies and rain?with thunderstorms in some areas?particularly along the Sea of ??Japan coast; it is a good idea to carry an umbrella if you go out.

Meanwhile, a high-pressure system moving in from the Asian continent is expected to cover the area around western Japan tomorrow, Thursday the 15th. As a result, many areas from western Japan to southern Tohoku will enjoy sunny weather. In western Japan, some locations may experience "summer-like days" with highs reaching 25C or above, so please wear clothing that allows for easy temperature adjustment.

A tropical depression near the Marshall Islands is likely to develop into Typhoon No. 30.

2026/10/14 15:45

A tropical depression has formed near the Marshall Islands.
It has a central pressure of 1004 hPa, with maximum sustained winds of 15 meters per second near the center and peak instantaneous gusts of 23 meters per second.
As of 12:00 PM today, Wednesday the 14th, the depression is moving southwest at a speed of approximately 15 kilometers per hour.

It is expected to shift its course to the west-northwest through tomorrow, Thursday the 15th,
and move westward at 25 kilometers per hour by Saturday the 17th.



Depending on its path, the system could affect weather conditions near Japan,
so please stay tuned for the latest updates.

If this tropical depression intensifies into a named typhoon, it will be designated as Typhoon No. 30.

This would mark the first time in 13 years?since 2013 (when 30 typhoons formed)?that the number of typhoons has reached or exceeded 30.

Weather for Today, Wednesday the 14th: Rain Across a Wide Area from Northern to Western Japan; Beware of Lightning and Strong Winds.

2026/10/14 07:26

Today, Wednesday the 14th, a low-pressure system will move northeast across the Sea of Japan, and a front will pass through northern and western Japan, bringing rain to a wide area.
As the front passes, there will be localized heavy downpours accompanied by thunder. Winds will also strengthen around the low-pressure system and front, creating a risk of driving rain.
If you are heading out, please carry a large umbrella and take precautions against lightning strikes and strong winds.



In the Hokkaido region, the center of the low-pressure system is expected to pass over the northern Sea of Japan, bringing rain to a wide area. The rain will gradually shift from west to east. However, on the Sea of Japan side, rain may persist into the night due to the influence of cold air.
Additionally, even after the low-pressure system moves away, a steep pressure gradient will cause very strong winds and high waves at sea; please exercise caution.

From the Tohoku region through eastern Japan, rainfall will intensify locally as a cold front passes, with heavy rain expected, particularly on the Sea of Japan side. Please be alert for lightning strikes and violent gusts, such as tornadoes.

In western Japan, the weather is tending to improve. Rain currently falling in some areas will gradually stop, and sunny spells are expected in the afternoon. Please be careful not to leave your umbrella behind.



As for high temperatures, cold air will flow in following the passage of the cold front, so maximum temperatures across the country will likely be lower than yesterday in many areas. Temperatures are expected to drop by as much as 6C compared to yesterday, particularly in areas along the Sea of Japan such as Akita, Yamagata, and Niigata. With highs just slightly above 20C, you will likely need long sleeves. It is also expected to get chilly at night, so please bring a warm outer layer if you plan to be out late.
On the other hand, maximum temperatures on the Pacific side will not drop as significantly; many areas across eastern and western Japan will see highs of 25C or higher?classified as a "summer day." Please dress in layers so you can adjust your clothing as needed.

Hokkaido should be on alert for strong winds and high waves from tomorrow, the 14th, through the 15th.

2026/10/13 21:18

A low-pressure system accompanied by a front is moving northeast across the Sea of Japan. This system is expected to intensify rapidly as it passes over the northern Sea of Japan tomorrow, Wednesday the 14th, and moves into the Sea of ??Okhotsk by the day after, Thursday the 15th.
Due to this intensifying low-pressure system, the pressure gradient near Hokkaido will steepen, likely resulting in very strong winds. Rough seas and high waves are also expected.
There is a possibility of warning-level gale-force winds and high waves, particularly along the Sea of Japan coast. Please be sure to check the latest information.



In the Hokkaido region, rain is forecast across a wide area tomorrow, Wednesday the 14th, as the front passes through. Winds will strengthen, and there is a risk of driving rain. Please exercise caution if you are going out.
High waves are also expected, especially along the Sea of Japan coast; please avoid approaching the shoreline as much as possible.
Forecasts for wind and waves are as follows:

[Wind Forecast Hokkaido]
Forecast maximum wind speeds (peak instantaneous wind speeds) for the 14th:
Northern Sea of Japan coast (land): 20 m/s (35 m/s)
Northern Sea of Japan coast (sea): 20 m/s (30 m/s)
Southern Sea of Japan coast (land): 18 m/s (30 m/s)
Southern Sea of Japan coast (sea): 20 m/s (30 m/s)
Forecast maximum wind speeds (peak instantaneous wind speeds) for the 15th:
Northern Sea of Japan coast (land): 20 m/s (35 m/s)
Northern Sea of Japan coast (sea): 20 m/s (30 m/s)
Southern Sea of Japan coast (land): 18 m/s (30 m/s)
Southern Sea of Japan coast (sea): 18 m/s (30 m/s)

[Wave Forecast Hokkaido]
Forecast wave heights for the 14th:
Northern Sea of Japan coast: 4 m
Southern Sea of Japan coast: 4 m
Forecast wave heights for the 15th:
Northern Sea of Japan coast: 5 m
Southern Sea of Japan coast: 5 m



[Disaster Prevention Information]

As a low-pressure system accompanied by a front passes through the Hokkaido region while rapidly intensifying, southerly winds will strengthen quickly to become very strong by the morning of tomorrow, the 14th (Wednesday). By nightfall, the wind will shift to a westerly direction and remain very strong through the day after tomorrow, the 15th (Thursday). Rough seas are expected.
In the northern part of the Sea of Japan side, please be on alert for violent winds from the morning of the 14th (Wednesday) through the 15th (Thursday).
Across the Sea of Japan side, please exercise caution regarding strong winds from the morning of the 14th (Wednesday) through the 15th (Thursday), and pay close attention to high waves on the 15th (Thursday).
Depending on the path and intensity of the low-pressure system, there is a risk that areas and timeframes affected by violent winds could expand, and seas could become very rough.
Additionally, in the southern part of the Sea of Japan side and the western part of the Pacific Ocean side, there is a risk of severe gusts (such as tornadoes), lightning strikes, hail, and sudden heavy rain from the early hours until late morning on the 14th (Wednesday). Please exercise caution during outdoor activities and when managing crops. If there are signs of approaching developed cumulonimbus clouds, please take steps to ensure your safety, such as moving into a sturdy building.

Weather forecast for tomorrow, Wednesday the 14th, and the day after, Thursday the 15th: Rain expected across a wide area tomorrow.

2026/10/13 19:06

As of 3:00 PM today, Tuesday the 13th, a low-pressure system accompanied by a front is located over the Sea of ??Japan and is moving northeast. Rain clouds associated with the front can be seen spreading across the Sea of ??Japan.





This low-pressure system is expected to intensify as it moves northeast. Rain is likely tonight in the Kyushu, Shikoku, and Chugoku regions as the front passes through. Warm, moist air flowing toward the front will destabilize the atmosphere, so caution regarding lightning strikes is advised through tomorrow morning.

The low-pressure system is forecast to reach the vicinity of Sakhalin by midday tomorrow, Wednesday the 14th. Consequently, cloudy skies and rain will spread across a wide area from western to northern Japan tomorrow, with some locations experiencing heavy rain accompanied by thunder. Afterward, the weather will begin to clear from the west, with rain expected to stop in western Japan by the afternoon. While skies will clear late at night along the Pacific coast from Kanto to Tohoku, unsettled weather is likely to persist into the night along the Sea of ??Japan coasts of Hokuriku and Tohoku. As the low-pressure system intensifies, winds will strengthen along the Sea of ??Japan coast of northern Japan; particular caution regarding gale-force winds is required in the Soya region.




A low-pressure system that has moved near Sakhalin is forecast to intensify while remaining relatively stationary. Consequently, residents of Hokkaido should remain alert for strong winds and high waves on Thursday the 15th. Additionally, a mass of cold air is expected to flow into the upper atmosphere over Hokkaido.
As atmospheric conditions will remain unstable following the passage of a front, there will likely be localized, intermittent rainfall.

Tomorrow, Tuesday the 14th, a cold front will pass over Honshu; rainfall will intensify, peaking in the morning. Caution is also advised regarding strong winds and high waves along the Sea of ​​Japan coast.

2026/10/13 15:40

Tomorrow, Tuesday the 14th, a cold front extending from a low-pressure system moving across the Sea of ??Japan will pass over Honshu. Rain is expected to spread across a wide area, particularly affecting regions along the Sea of ??Japan coast.




In regions along the Sea of ??Japan coast, rainfall is likely to peak between tomorrow morning and midday. From the Sea of ??Japan side of Northern Japan through the Hokuriku region, the rain will intensify as the cold front passes, with the potential for localized heavy downpours accompanied by thunder.
Rain is also expected to spread to regions along the Pacific coast, including Tohoku, Kanto, and Tokai.

Please exercise caution regarding potential hazards such as sudden rainfall causing flooded roads or inundation in low-lying areas. Also, be alert for lightning strikes and violent gusts of wind, including tornadoes.
As the period of heaviest rainfall may coincide with tomorrow's morning commute to work or school, please stay updated on the latest traffic information.



In the afternoon, the cold front is expected to move east of Japan, and the rain should stop in many areas. However, along the Sea of ??Japan coast?specifically in southern Tohoku and Hokuriku?localized rain clouds may linger, leading to intermittent rain in some places throughout the afternoon.

Additionally, the spacing between isobars is narrowing over the area near Honshu; consequently, winds from the north to west are expected to strengthen, particularly along the coast facing the Sea of ??Japan. Along the Pacific coast, winds from the south are also likely to pick up. Please be cautious of strong winds and high waves in coastal areas.

Weather for today, Tuesday the 13th: Conditions expected to gradually deteriorate in Western Japan; a pleasant day ahead for Eastern Japan.

2026/10/13 07:14

Today, Tuesday the 13th, a low-pressure system over the East China Sea will intensify as it moves eastward, causing weather conditions to gradually deteriorate across western Japan?particularly in the Kyushu, Chugoku, and Shikoku regions. A folding umbrella is essential if you are heading out. From the Kinki region northward, the influence of moist air will likely lead to cloudy skies.
Meanwhile, eastern and northern Japan will be under the gentle influence of a high-pressure system, resulting in generally sunny or cloudy weather.
Typhoon No. 29 is moving north-northeast off the east coast of Japan, maintaining strong intensity.
While it will have little direct impact on Japan, caution is advised regarding high waves accompanied by swells.





High temperatures are expected to hover around 25C, making for pleasant weather following the holiday weekend.
Looking ahead, a low-pressure system accompanied by a front is expected to move across the Sea of ??Japan, bringing rain to a wide area stretching from the Chugoku and Shikoku regions to northern Japan; heavy rain is anticipated along the Sea of ??Japan coast. Conversely, Kyushu and Okinawa will come under the influence of a high-pressure system again, and weather conditions there are expected to gradually improve.

Strong Typhoon No. 29 moving north off the east coast of Japan; high waves expected along the Kanto coast.

2026/10/13 07:06

As of 6:00 a.m., Typhoon No. 29 is located east of Japan and is moving northeast at a speed of approximately 30 km/h.

? Typhoon No. 29 ? Tuesday the 13th, 6:00 a.m.
==================
Center location: East of Japan
Intensity: Strong
Movement: Northeast, 30 km/h
Central pressure: 975 hPa
Max. sustained wind: 35 m/s (near center)
Max. instantaneous wind: 50 m/s
==================



Typhoon No. 29 is expected to continue moving northeast while gradually weakening; as it moves further away from the vicinity of Japan, it is not anticipated to have a direct impact on the Japanese archipelago.

However, swells generated by the typhoon will reach the coast, resulting in continued high waves in areas stretching from the Pacific coast of southern Tohoku down to the Izu Islands. As of 6:00 a.m., high-wave advisories have been issued for regions ranging from Fukushima Prefecture through Ibaraki and Chiba Prefectures to the Izu Islands. Since high wave conditions are expected to persist until late tonight, those engaging in marine leisure activities should remain cautious and not let their guard down, even if the weather is sunny.